I do research in ancient times

The child raised his head, and stared at Ning Fei vigilantly with a pair of green eyes, like a little animal protecting its food.

He was choked to the point of tears, but his mouth was tightly shut, desperately chewing the food in his mouth.

"Drink it, it's not poisoned, or you'll choke to death."

Ning Fei said lightly.

The child glared at him, but couldn't bear the desire to drink water after all, took the water bag and drank several mouthfuls "gudongdong".

Ning Fei kicked the bow on the ground, the child picked it up vigilantly, and held it behind him.

It was not until he swallowed the last bite of potatoes that he said viciously:

"Aren't you afraid that I will kill you?"

"kill me?"

Ning Fei smiled and picked up the feather arrow on the ground.

"Arrowheads of this kind of wood?"

With a chuckle, he pointed at the hand crossbow in the child's hand.

"This thing is exquisitely made, but it's just a toy. Its range and strength can't kill people. It will hurt me a few times at most."

"If the material of your arrow tip can be made of iron or copper with higher strength, maybe I won't dare to come out to bring you water to drink, and you will probably choke to death on potatoes, and I just lost a lunch. Looks like you are at a bigger loss."

The child couldn't understand words like "material" and "hardness", but this didn't prevent him from seeing the joke on Ning Fei's face.

He has lived a miserable life since he was a child, and it is only because of this crossbow that he was not bullied to death.Now this nasty bastard said he was a showman and looked down on him, and the kid was about to explode.

He has the blood of Nanshi warriors in his body, and he is born to be a sharpshooter!How could he miss the shot!

"You fart!"

The child's disheveled hair stood up in anger, pointed the point of the crossbow's arrow at Ning Fei's throat, and said viciously.

"If I kill you, you will know how powerful it is!"

Ning Fei took a step back, her delicate face relaxed.

"Then you can try."

The child gritted his teeth, and his fingers tightly gripping the hand crossbow trembled slightly.

He didn't want to kill this man, but this bastard must know how powerful Clay is. Clay is the son of a warrior, and the reputation of a warrior cannot be slandered!

He knew from a young age that he must be strong, otherwise he would not be able to protect his mother, and both mother and child would not be able to survive.

The adults in the village bullied the weak and feared the strong. In the past, his mother worked so hard to grow the grain for a year. When the harvest came, idlers came and clamored to draw the land boundary, trying to take away most of the rations from their mother and child.

The elders, usually full of ancestral rules, didn't say a word at this time, even though his mother's eyes were swollen from crying, she refused to come out and say a word for them.

Just because his father is a barbarian, he was born with barbarian blood!

They said that he was a bastard, a debtor who should not have been born, that the barbarian and the barbarian had a sworn feud, and that his mother gave birth to a barbarian's child, which tarnished the reputation of the village and clan, and should have ended her life a long time ago.

But his mother said that his father is a good man, different from those bad people who only know how to burn, kill and loot!

His father's tribe is called Nanshi, which is far away in another grassland, and has never gone south.

The traveling merchant sold Yechao's goods to the grassland. When his father saw the exquisite mechanism box, he yearned for the world on the other side of the grassland. Relying on his martial arts skills, he rode thousands of miles to the village in the border town and rescued him. A young girl who was kidnapped by a barbarian.

That girl is his mother.

Later, his father and his mother fell in love, and they worshiped the gods according to the Nanshi custom, became husband and wife, and had him.

But when he was four or five years old, Hu people came to the place where they lived, and the villagers blamed his parents for causing trouble, so his father went up the mountain to protect the villagers, and he was hacked to death by Hu Qi.

This crossbow was a gift from his father.

He was hit on the head by a child in the village, so his mother gave him the crossbow.The blood of Nanshi warriors flowed on his body, and his archery accuracy was better than that of an adult, and soon no one dared to provoke their mother and child.

Last year, a military rebellion took the lives of his mother and the villagers. He couldn't go back to the dead place, so he wandered around the Niubei Mountain, eating and feeding, relying on this crossbow.

He has shot sparrows, voles, larger pheasants and hares, and his archery is getting more and more proficient, and he is already a warrior!

Therefore, those who must slander the warriors know how powerful they are!

With a movement of his fingers, the wooden arrow was shot out, but the hand holding the crossbow was slightly shifted half an inch to the side.

The child thought to himself, although this bastard is blind, but after all he was given half a pot of water and a piece of food, it was enough to scare him.

He waited to see how the other party panicked, maybe he would fall into the mud because of fear.The idle man next door to his house used to be like this, he was so frightened that he fell straight into the latrine.

However, this time the kid was disappointed.

The boy on the opposite side, who didn't look much older than him, was so motionless, standing there and looking at him with a smile, as if he was sure that he would miss the shot.

And he did miss.

The wooden arrow only flew for a small half before showing signs of decay, and finally fell a step away from the boy's shoes.

The child was stunned.

It is true that he missed half an inch when shooting the arrow, but it shouldn't even touch a corner of his clothes!

According to his expectation, the wooden arrow should brush the bastard's shoulder, or at least hit the sleeve, but according to the flight route of this arrow, even if he didn't show mercy, he still wouldn't be able to hit the bastard.

hateful!what happened?

The child scratched his head anxiously, and finally remembered that the bastard had kicked his crossbow while he was eating, and that was probably the problem at that time.

He glared at Ning Fei, who responded with a kind smile.

"It's nothing. The angle of the bow arm changes, and the force on the arrow is different. If you shoot with the usual method, there will inevitably be deviations."

"I've estimated your arm strength, and I can roughly figure out the range of your crossbow under normal conditions. I'm standing in the upper wind, and I just stepped on the edge of the range. It's not normal for you to miss it."

The child was left with a "range" and another "strength" by him, and his eyes were filled with mosquito coils.He was about to curse, but he heard heavy footsteps coming from the mountain road behind him.The child stomped his feet, "Wait! Wait until I come back to settle accounts with you!"

After finishing his harsh words, the child, like a rabbit, slid into the grass and disappeared without a trace.

"Keep Moko waiting for a long time!"

Yang Heizi came down from the top of the mountain carrying a pole, and both baskets were filled with stones.

Liu Tie, who was following behind him, was also in the same posture. Both of their heads were covered with beads of sweat, and their shoulders were deeply scratched by the shoulder poles, but their steps down the mountain were very solid.

"These are square stones, please look at them, Juzi."

As Yang Heizi spoke, he picked up the basket in front of Ning Fei.

Ning Fei took out a piece casually and looked at it. It was indeed limestone, and Yang Heizi specially chose small pieces. He must have remembered what he said before that it should be calcined and crushed.

"Very well, we can go back to the city."

Ning Fei said with a smile.

He didn't mention a word about being robbed by a child before, and the other party just wanted a bite to eat. He didn't really want to seek wealth and death, so there's no need to take it too seriously.

He even thought that the child's angry appearance was quite cute.

When the three of them returned to Wubao, the other two groups had already completed their tasks.

Xu Baoshan and Zhang Erzhu led people to pile up the prepared gypsum, slag and clay in front of the fire kiln in the back mountain, and sent a disciple to guard the mountain. The rest of the staff went to Sanchagou, where Mo Zong found an open-pit coal mine , Wubao's daily smelting uses coal.

When Ning Fei arrived, there was a scene of labor in full swing in front of the kiln.

"Juzi is back."

"Juzi is back."

Everyone greeted him one after another.

Although no one thought his mud was reliable, everyone worked without compromise, and the materials were neatly sorted and piled up. Ning Fei nodded after checking.

"Very well, we can begin."

At the beginning, everyone was still in a daze.

Xu Baoshan and Zhang Erzhu glanced at each other, and then looked at Ning Fei together, their eyes were filled with naive bewilderment.

Heh, the test sites are all circled, so I know you didn't pay attention!

Ning Fei shook his head, beckoning Yang Heizi to put all the limestone on the burden in front of the furnace.

"Smash first,"

He said to Xu Baoshan and Zhang Erzhu: "They were all smashed into pieces of about one catty, the particle size..."

Suddenly remembering that the measurement standards in this era are different from those in modern times, Ning Fei made a gesture casually, "It's so big, put the big ones in the middle of the kiln, and put the small ones on the side."

Then he turned his head to look at Liu Tie.

"You know how to fire a kiln. You should understand. The coal I fill in here must be thin, that is, small-grained coal. Try to spread it as evenly as possible. Keep a certain distance between the kiln mouth and the mixture inside. Try to keep the coal inside as small as possible. temperature balance."

"After the lime leaves the kiln, it needs to be further crushed and ground. The finer the particles, the better. Do you have any grinding equipment?"

Everyone looked at each other in blank dismay, and finally Zhang Erzhu remembered that there was a stone pestle for pounding mud bricks in the civil engineering team.

"Is this thing okay?"

The black and strong man asked in a low voice.

"Then you have to hit it with a hammer. These are all big white stones. I don't know if they can be smashed."

"Juzi, why do you still have to smash a stone into pieces after burning it? After all, don't you still have to smash it? Why waste that second time?"

This question was also what the other eight people wanted to ask, but they were too embarrassed to ask because of Juzi's status, that is, Zhang Erzhu, a foolish and straightforward person, but he just spoke his mind.

Ning Fei thought about it, and decided to explain in as simple a language as possible.

"The purpose of smashing is to make the calcination more uniform, because the temperature will change the composition of the object, just like the coal you use to make iron. After smoldering, it becomes coke, which will be more resistant to burning than ordinary coal."

"The same is true for burning limestone. If it can't be heated evenly, some large pieces of limestone will be overburned on the outside and still have a cold core inside. Such finished products cannot be used."

"So everyone has to work hard and try to smash the stones evenly. Our batch is a trial product, and the quantity is not large, so it should be easy to operate."

As he said that, he was about to pick up the stone pestle and smash him together as a demonstration, but suddenly Liu Tie grabbed his sleeve by the side.

The big black man looked nervous, his eyes shone like light bulbs on Ning Fei's face, and he stammered and asked.

"Jizi, what kind of charcoal did you just mention... What is it? How can it be more resistant to burning than coal?"

The author has something to say: Liu Tie: Although I can't understand what the saw said, I feel that it is very important!